67639770085 has 16 divisors (see below), whose sum is σ = 88905826800. Its totient is φ = 49172601856.

The previous prime is 67639770083. The next prime is 67639770097. The reversal of 67639770085 is 58007793676.

It can be written as a sum of positive squares in 8 ways, for example, as 3844124001 + 63795646084 = 62001^2 + 252578^2 .

It is a cyclic number.

It is not a de Polignac number, because 67639770085 - 2¹ = 67639770083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67639770083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13717570 + ... + 13722499.

It is an arithmetic number, because the mean of its divisors is an integer number (5556614175).

Almost surely, 2^67639770085 is an apocalyptic number.

It is an amenable number.

67639770085 is a deficient number, since it is larger than the sum of its proper divisors (21266056715).

67639770085 is a wasteful number, since it uses less digits than its factorization.

67639770085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27440120.

The product of its (nonzero) digits is 13335840, while the sum is 58.

The spelling of 67639770085 in words is "sixty-seven billion, six hundred thirty-nine million, seven hundred seventy thousand, eighty-five".